My Review - They are good quality but the instructions that come with it aren't as clear as those in say lego sets. The pieces are small and more fiddly so Mr 5 needed a bit more support and prompting with it but quickly worked it out. It has been excellent in refining fine motor skills, developing patience and problem solving skills. I'd def recommend for 5yrs + but know this is something they may need adult support with initially so a great experience for the holidays or weekends or when when you have a little time to build together.